7-Substituted umbelliferone derivatives as androgen receptor antagonists for the potential treatment of prostate and breast cancer
作者:Sahar Kandil、Andrew D. Westwell、Christopher McGuigan
DOI:10.1016/j.bmcl.2016.02.088
日期:2016.4
The clinically used androgenreceptor (AR) antagonists (bicalutamide, flutamide and nilutamide) bind with low affinity to AR and can induce escape mechanisms. Furthermore, under AR gene amplification or mutation conditions they demonstrate agonist activity and fail to inhibit AR, causing relapse into castration resistant prostatecancer (CRPC). Discovery of new scaffolds distinct from the 4-cyano/
A series of 7‐(2‐oxoalkoxy)coumarins have been synthesized by conjugating substituted 7‐hydroxycoumarins with different chloroketones. The anti‐inflammatory properties of 7‐(2‐oxoalkoxy)coumarins were studied in LPS‐induced inflammatory response in J774 macrophages. Western blot was used to determine the expression of iNOS and COX‐2, NO was determined by measuring its metabolite nitrite by Griess reaction
New amino psoralen derivatives have been synthesized via bromination. Bromination of 3,5‐substituted psoralens has been studied. The second position of the furan ring is more susceptible to bromination than the α‐position of the chromen‐2‐one ring in psoralens. Hence, the target psoralenamines were synthesized starting with 3‐bromo‐7‐hydroxy‐4‐methyl‐chromen‐2‐one, which was condensed with different
Novel Traceless Liquid‐Phase Synthesis of Coumarin Derivatives on Poly(Ethylene Glycol) Support
作者:Shou‐Ri Sheng、Pei‐Gang Huang、Qiong Wang、Ren Huang、Xiao‐Ling Liu
DOI:10.1080/00397910600908868
日期:2006.10.1
Abstract Coumarin derivatives were prepared by the von Pechmann reaction of PEG‐bound acetoacetate reagent with phenols in the presence of TiCl4 in excellent yield and purity with a facile workup procedure. The polymer reagent could be recycled two to four times without diminishing the yield or purity.
摘要 香豆素衍生物是通过 PEG 结合的乙酰乙酸酯试剂与酚类在 TiCl4 存在下的 von Pechmann 反应制备的,收率和纯度都很好,后处理程序简单。聚合物试剂可以循环使用两到四次而不降低产量或纯度。